#!/bin/bash
DIRECTORY="$(readlink -f "$(dirname "$0")")"

source "${DIRECTORY}/api" || error "failed to source ${DIRECTORY}/api"

function error {
  echo -e "\e[91m$1\e[39m"
  exit 1
}

#ensure settings dir exists
if [ ! -d "${DIRECTORY}/data/settings" ];then
  echo "creating settings directory"
  mkdir -p "${DIRECTORY}/data/settings"
  #create default files inside
  echo '' > "${DIRECTORY}/data/settings/reinstall-after-update"
fi

#$1 is usually left blank. If it equals 'refresh', then empty settings will be created and then the script will exit.
if [ "$1" == 'refresh' ];then
  #set default settings, if they don't exist
  settings="$(ls "${DIRECTORY}/etc/setting-params" | tr '\n' '|')"
  PREIFS="$IFS"
  IFS='|'
  for name in $settings
  do
    if [ ! -f "${DIRECTORY}/data/settings/${name}" ] || [ -z "$(cat "${DIRECTORY}/data/settings/${name}")" ];then
      cat "${DIRECTORY}/etc/setting-params/${name}" | grep -v '#' | head -n1 > "${DIRECTORY}/data/settings/${name}"
    fi
  done
  IFS="$PREIFS"
  exit 0
  
elif [ "$1" == 'revert' ];then #If $1 equals 'revert', then overwrite all settings with the defaults and then the script will exit.
  
  #overwrite all settings with the defaults
  settings="$(ls "${DIRECTORY}/etc/setting-params" | tr '\n' '|')"
  PREIFS="$IFS"
  IFS='|'
  for name in $settings
  do
    cat "${DIRECTORY}/etc/setting-params/${name}" | grep -v '#' | head -n1 > "${DIRECTORY}/data/settings/${name}"
  done
  IFS="$PREIFS"
  exit 0
fi

if [ ! -f ~/.local/share/applications/pi-apps-settings.desktop ];then
  echo "Creating Settings menu button"
  echo "[Desktop Entry]
Name=Pi-Apps Settings
Comment=Configure Pi-Apps or create an App
Exec=${DIRECTORY}/settings
Icon=${DIRECTORY}/icons/settings.png
Terminal=false
StartupWMClass=Pi-Apps-Settings
Type=Application
Categories=Settings;
StartupNotify=true" > ~/.local/share/applications/pi-apps-settings.desktop
  
fi

exitloop=''
while [ -z $exitloop ];do
  
  settings="$(ls "${DIRECTORY}/etc/setting-params" | tr '\n' '|')"
  yadparams=()
  tooltips=()
  PREIFS="$IFS"
  IFS='|'

  # generate yad/xlunch themes based on system installed themes
  # yad is compiled using gtk3 on all distros so only gtk3 themes are valid

  theme_dirs=( /usr/share/themes ~/.local/share/themes ~/.themes )
  # begin array with yad default theme
  declare gtk3_themes=("default")
                      
  for td in "${theme_dirs[@]}"; do
    for th in "$td"/*; do
      [[ -d "$th" ]] || continue
      thname=${th##*/}
      [ "$thname" != Default ] && [ $(ls "$th/gtk-3."* 2>/dev/null | wc -l ) -gt 0 ] && gtk3_themes+=("$thname")
    done
  done
  gtk3_themes=( "${gtk3_themes[@]/#/yad-}" )
  # add xlunch preset themes to the array
  gtk3_themes+=( "xlunch-dark" )
  gtk3_themes+=( "xlunch-dark-3d" )
  gtk3_themes+=( "xlunch-light-3d" )
  params=$( IFS=$'\n'; echo "${gtk3_themes[*]}" )
  unset gtk3_themes

  name="App List Style"
  
  #create file if necessary
  if [ ! -f "${DIRECTORY}/data/settings/${name}" ] || [ -z "$(cat "${DIRECTORY}/data/settings/${name}")" ];then
    cat "${DIRECTORY}/etc/setting-params/${name}" | grep -v '#' | head -n1 > "${DIRECTORY}/data/settings/${name}"
  fi
  #get current setting
  curval="$(cat "${DIRECTORY}/data/settings/${name}")"
  
  #order params, with selected option first
  params="$(echo "$params" | grep -x "$curval")
$(echo "$params" | grep -vx "$curval")"
  
  # remove blank lines (like if the current selected option no longer exists) and format as one line output separated by !
  params="$(echo "$params" | awk NF | tr '\n' '!')"
  params="${params::-1}"
  
  tooltip="Pi-Apps can display the apps as a compact list (yad), or as a group of larger icons. (xlunch)"
  
  yadparams+=(--field=:CB "${params}")
  tooltips+=(--field="${name}":!!"${tooltip}":BTN '')

  unset name
  unset tooltip
  unset params
  unset curval
  
  for name in $settings
  do
    [ "${name}" == "App List Style" ] && continue
    params="$(cat "${DIRECTORY}/etc/setting-params/${name}" | grep -v '#')"
    
    #create file if necessary
    if [ ! -f "${DIRECTORY}/data/settings/${name}" ] || [ -z "$(cat "${DIRECTORY}/data/settings/${name}")" ];then
      cat "${DIRECTORY}/etc/setting-params/${name}" | grep -v '#' | head -n1 > "${DIRECTORY}/data/settings/${name}"
    fi
    #get current setting
    curval="$(cat "${DIRECTORY}/data/settings/${name}")"
    
    #order params, with selected option first
    params="$(echo "$params" | grep -x "$curval")
$(echo "$params" | grep -vx "$curval")"
    
    params="$(echo "$params" | tr '\n' '!')"
    params="${params::-1}"
    
    tooltip="$(cat "${DIRECTORY}/etc/setting-params/${name}" | grep '^#' | tr -d '#' | tr '\n' '\r')"
    tooltip="${tooltip::-1}"
    #echo "Params of ${name}: ${params}"
    #echo "Tooltip of ${name}: ${tooltip}"
    
    yadparams+=(--field=:CB "${params}")
    tooltips+=(--field="${name}":!!"${tooltip}":BTN '')
  done
  IFS="$PREIFS"
  
  output="$(yad --class Pi-Apps-Settings --name "Pi-Apps Settings" --center --title='Pi-Apps Settings' --width=310 --height=300 \
    --form --separator='\n' --window-icon="${DIRECTORY}/icons/settings.png" --columns=2 \
    "${tooltips[@]}" \
    --field='Categories'!"${DIRECTORY}/icons/categories.png"!"Does an App belong in Editors instead of Tools? This lets you move it.":FBTN "bash -c '${DIRECTORY}/etc/categoryedit 1>&2'" \
    --field='Log files'!"${DIRECTORY}/icons/log-file.png"!"View past installation logs. Useful for debugging, or to see what you installed yesterday.":FBTN "bash -c '${DIRECTORY}/etc/logviewer 1>&2'" \
    --field='Multi-Install'!"${DIRECTORY}/icons/multi-select.png"!"Install multiple apps at the same time.":FBTN "bash -c '${DIRECTORY}/api multi_install_gui 1>&2'" \
    "${yadparams[@]}" \
    --field='New App'!"${DIRECTORY}/icons/create.png"!"Make your own app! It's pretty easy if you follow the instructions.":FBTN "bash -c '${DIRECTORY}/createapp 1>&2'" \
    --field='Import App'!"${DIRECTORY}/icons/categories/Imported.png"!"Did someone else make an app but it's not on Pi-Apps yet? Import it here.":FBTN "bash -c '${DIRECTORY}/etc/import-app 1>&2'" \
    --field='Multi-Uninstall'!"${DIRECTORY}/icons/multi-select.png"!"Uninstall multiple apps at the same time.":FBTN "bash -c '${DIRECTORY}/api multi_uninstall_gui 1>&2'" \
    --button='Reset'!"${DIRECTORY}/icons/backup.png"!'Reset all settings to their defaults':2 \
    --button=Cancel!"${DIRECTORY}/icons/exit.png":1 \
    --button=Save!"${DIRECTORY}/icons/check.png":0 \
  )"
  
  button=$? #get exit code to determine which button was pressed
  #exit if save was not clicked
  [ $button -ne 0 ] && [ $button -ne 2 ] && exit 0

  if [ $button -eq 2 ];then
    output=''
    "${0}" revert
  else
    exitloop=yes
  fi
done

#remove empty lines from $output
output="$(echo "$output" | grep .)"

echo "Output: ${output}EOO"

settings="$(ls "${DIRECTORY}/etc/setting-params" | tr '\n' '|')"

settingnumber=1

PREIFS="$IFS"
IFS='|'
for name in $settings
do
  curval="$(echo "$output" | sed -n "${settingnumber}p")"
  
  echo "Setting '$name' to '$curval'"
  echo "$curval" > "${DIRECTORY}/data/settings/${name}"
  
  settingnumber=$((settingnumber + 1))
done
IFS="$PREIFS"


